I'm not the one importing it to the UK, i can buy it online from the UK. If they are breaking the law then thats down to them. I haven't tried it as yet but from what i have heard i would certainly like to give it a try.
Stevia is a natural product where as splenda is chemically made. From what i have read on AS including splenda i believe the least i eat of this the better, as heaven knows what the long term health effects are.